代码奉上~
public static void fileCopy(File src,File target) throws IOException {
InputStream in = new FileInputStream(src);
FileOutputStream out = new FileOutputStream(target);
byte[] buffer = new byte[20 * 1024];
while ((in.read(buffer,0,buffer.length))!=-1){
out.write(buffer);
}
in.close();
out.close();
}